__________ she couldn’t understand was _________ fewer and fewer students showed interest in her lessons.
A. What; why B. That; what C. What; because D. Why; that
The clever boy made a hole in the wall, ________ he could see what was going on inside the building.
A. on which B. at which C. through which D. in which
—What sort of house do you want to have? Something big?
—Well, it _______ be big—that’s not important. But it _________ have a nice garden—that’s important for me.
A. mustn’t; need B. needn’t; must
C. couldn’t; need D. shouldn’t; must
—The windows are dirty.
—I know. They _________ for weeks.
A. haven’t cleaned B. didn’t clean
C. weren’t cleaned D. haven’t been cleaned
Do you remember the name of the company ___________?
A. where she works at B. in which she works
C. for which she works in D. in where she works
—Is Pro. Smith giving the speech today?
—It __________ be him. He is abroad right now.
A. can’t B. needn’t C. won’t D. mustn’t
